No Harm Intended (1988)

Catherine's secret affair is exposed when her father-in-law, Paul, inadvertently discovers her infidelity. Concerned for his son, Thomas, Paul heads to inform him but suffers a car accident that leaves him wheelchair-bound and unable to communicate. Stricken with guilt, Catherine becomes increasingly frantic, desperate to keep her betrayal hidden from Thomas. As pressure mounts, her anxiety drives her to consider drastic measures against Paul in a chilling twist of morality and desperation, leading to a gripping exploration of the lengths one might go to protect their secrets.